.el-carousel__item h3 {
    color: #475669;
    font-size: .32rem;
    text-align: center;
    opacity: 0.75;
    line-height: 4.55rem;
    margin: 0;
}

.banner{
    img{
        display: block;
        width: 100%;
        height: 4.55rem;
    }
}

.el-carousel__item:nth-child(2n) {
    background-color: #99a9bf;
}

.el-carousel__item:nth-child(2n+1) {
    background-color: #d3dce6;
}